| 摘要 |
PROBLEM TO BE SOLVED: To obtain the new compound strongly adsorbing on the surface of a metal material such as aluminum, iron and steel product, etc., having an excellent rustproofing action even in a thin film, useful as a metal surface treating agent. SOLUTION: This compound containing tricarbonyl groups is shown by formula I (R1 is H or methyl; R2 and R3 are each a 2-10C alkenyl containing a double bond at a 2-10C end or a 1-10C alkyl; (1) is a 1-3C alkylene; (x), (y) and (z) are each 0 or 1) such as a compound of formula II. The compound of formula I is obtained, for example, by reacting a dicarbonyl compound of formula III with a compound of formula IV in the presence of magnesium chloride and an amine.
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